检索结果-南通市图书馆

Temporal and Tissue-Specific Expression of Tomato 14-3-3 Gene Family in Response to Phosphorus Deficiency

Pedosphere 2012年第6期22卷 735-745页

作者： xu wei-feng SHI wei-Ming YAN feng State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008(China) Institute of Crop Science and Plant Breeding Justus-Liebig UniversityLudwigstrasse 2335390 Giessen(Germany)

Plants adapt to phosphorus （P） deficiency through a complex of biological processes and many genes are involved. Tomato （Solanum lycopersicum L. ＇Hezuo906＇） plants were selected to grown hydroponically to study the temporal and spatial gene expression patterns of the 14-3-3 gene family and their roles in response to P deficiency in tomato plants. Using real-time reverse-transcriptase polymerase chain reaction （RT-PCR）, we investigated the expression profiles in different tissues （root, stem and leaf） at short-term and long-term P-deficient stress phases. Results revealed that i） four members of 14-3-3 gene family （TFT1, TFT4, TFT6 and TFTT） were involved in the adaptation of tomato plants to P deficiency, ii） TFT7 responded quickly to P deficiency in the root, while TFT6 responded slowly to P deficiency in the leaf, iii） expression response of TFT4 to P-deficient stress was widely distributed in different tissues （root, stem and leaf） while TFT8 only displayed stem-specific expression, and iv） temporal and tissues-specific expression patterns to P deficiency suggested that isoform specificity existed in tomato 14-3-3 gene family. We propose that TFT7 （one member of e-like group in tomato 14-3-3 family） is the early responsive gene and may play a role in the adaptation of tomato plants to shortterm P deficiency, while TFT6 （one member of non-e group in tomato 14-3-3 family） is the later responsive gene and may play a role in the adaptation of tomato plants to long-term P deficiency.

关键词： isoform specificity mRNA P starvation primer pairs real-time RT-PCR

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Mechanisms of Salt Tolerance in Transgenic Arabidopsis thaliana Carrying a Peroxisomal Ascorbate Peroxidase Gene from Barley

引用

Pedosphere 2008年第4期18卷 486-495页

作者： xu wei-feng SHI wei-Ming A. UEDA T. TAKABE State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 （China）. Graduate School of the Chinese Academy of Sciences Beijing 100049 （China） Graduate School of Bioagricultural Sciences Nagoya University Nagoya 464-8601 （Japan

Ascorbate peroxidases （APX）, localized in the cytosol, peroxisome, mitochondria, and chloroplasts of plant cells, catalyze the reduction of H2O2 to water by using ascorbic acid as the specific electron donor. To determine the role of peroxisomal type ascorbate peroxidase （pAPX）, an antioxidant enzyme, in protection against salt-induced oxidative stress, transgenic Arabidopsis thaliana plant carrying a pAPX gene （HvAPX1） from barley （Hordeum vulgate L.） was analyzed. The transgenic line pAPX3 was found to be more tolerant to salt stress than the wild type. Irrespective of salt stress, there were no significant differences in Na^＋, K^＋, Ca^2＋, and Mg^2＋ contents and the ratio of K^＋ to Na^＋ between pAPX3 and the wild type. Clearly, the salt tolerance in pAPX3 was not due to the maintenance and reestablishment of cellular ion homeostasis. However, the degree of H2O2 and lipid peroxidation （measured as the levels of malondialdehyde） accumulation under salt stress was higher in the wild type than in pAPX3. The mechanism of salt tolerance in transgenic pAPX3 can thus be explained by reduction of oxidative stress injury. Under all conditions tested, activities of superoxide, glutathione reductase, and catalase were not significantly different between pAPX3 and the wild type. In contrast, the activity of APX was significantly higher in the transgenic plant than in wild type under salt stress. These results suggested that in higher plants, HvAPX1 played an important role in salt tolerance and was a candidate gene for developing salttolerant crop plants.

关键词： ascorbate peroxidase oxidative stress peroxisome soil salinity transgenic Arabidopsis thaliana

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Mean First-Passage Time of an Asymmetric Kinetic Model Driven by Two Different Kinds of Colored Noises

引用

Communications in Theoretical Physics 2008年第3期49卷 689-695页

作者： LI Dong-Xi xu wei GUO Yong-feng WANG Liang Department of Applied Mathematics Northwestern Polytechnical University Xi＇an 710072 China

The mean first-passage time （MFPT） of an asymmetric bistable system between multiplicative non-Gaussian noise and additive Gaussian white noise with nonzero cross-correlation time is investigated. Firstly, the non-Markov process is reduced to the Markov process through a path-integral approach; Secondly, the approximate Fokker Planck equation is obtained by applying the unified colored noise approximation and *** Theorem. The steady-state probability distribution （SPD） is also obtained. The basal functional analysis and simplification are employed to obtain the approximate expressions of MFPT T^±. The effects of the asymmetry parameter β, the non-Gaussian parameter （measures deviation from Gaussian character） r, the noise correlation times τ and τ2, the coupling coefficient A, the intensities D and a of noise on the MFPT are discussed. It is found that the asymmetry parameter β, the non-Gaussian parameter r and the coupling coefficient A can induce phase transition. Moreover, the main findings are that the effect of self-existent parameters （D, α, and τ） of noise and cross-correlation parameters （A, 7-2） between noises on MFPT T^± is different.

关键词： mean first-passage time asymmetric bistable system non-Gaussian noise Gaussian noise

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Transient Properties of a Bistable System with Delay Time Driven by Non-Gaussian and Gaussian Noises:Mean First-Passage Time

引用

Communications in Theoretical Physics 2008年第9期50卷 669-673页

作者： LI Dong-Xi xu wei GUO Yong-feng LI Gao-Jie Department of Applied Mathematics Northwestern Polytechnical University Xi＇an 710072 China

The mean first-passage time of a bistable system with time-delayed feedback driven by multiplicative non-Gaussian noise and additive Gaussian white noise is investigated. Firstly, the non-Markov process is reduced to the Markov process through a path-integral approach; Secondly, the approximate Fokker-Planck equation is obtained by applying the unified coloured noise approximation, the small time delay approximation and the Novikov Theorem. The functional analysis and simplification are employed to obtain the approximate expressions of MFPT. The effects of non-Gaussian parameter （measures deviation from Gaussian character） r, the delay time τ, the noise correlation time to, the intensities D and a of noise on the MFPT are discussed. It is found that the escape time could be reduced by increasing the delay time τ, the noise correlation time τ0, or by reducing the intensities D and α. As far as we know, this is the first time to consider the effect of delay time on the mean first-passage time in the stochastic dynamical system.

关键词： mean first-passage time delay time non-Gaussian noise Gaussian noise bistable system

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of High Suspension and Low Incision Surgery Based on Traditional Ligation of Chinese Medicine in Treatment of Mixed Haemorrhoids:A Multi-centre,Randomized,Single-Blind,Non-inferiority Clinical Trial

引用

Chinese Journal of Integrative Medicine 2021年第9期27卷 649-655页

作者： JIA Xiao-qiang CAO wei-wei QUAN Long-fang ZHAO wei-bing CHENG Fang JIA Shan feng Liu-quan wei xu-feng XIE Zhen-nian WANG Dong xu Chun-yan CUI Chun-hui CAI Xing-juan HE Lan-ye WANG Zhan-jun TIAN Ying SHI Shu-min SUN Si-miao SU Liang ZHAI Meng-fan Department of Anorectal Xiyuan HospitalChina Academy of Chinese Medical SciencesBeijing(100091)China Department of Anorectal Beijing Rectum HospitalBeijing(100120)China Department of Anorectal Air Force Medical CenterPeople's Liberation Army of ChinaBeijing(100089)China Department of Anorectal Puyang Hospital of Traditional Chinese MedicinePuyangHenan Province(457001)China

Objective:To observe the clinical effect of high suspension and low incision(HSLI)surgery on mixed haemorrhoids,compared with Milligan-Morgan ***:A multi-centre,randomized,singleblind,non-inferiority clinical trial was *** with mixed haemorrhoids from Xiyuan Hospital of China Academy of Chinese Medical Sciences,Beijing Rectum Hospital,Air Force Medical Center of People's Liberation Army of China,and Puyang Hospital of Traditional Chinese Medicine were enrolled from September 2016 to March *** using a blocked randomization scheme,participants were assigned to two *** experimental group was treated with HSLI,while the control group was treated with Milligan-Morgan *** primary outcome was the clinical effect evaluated at 12 weeks after *** secondary outcomes included the number of haemorrhoids treated during the operation,pain scores,use of analgesics,postoperative oedema,wound healing,incidence of anal stenosis,anorectal manometry after operation,as well as surgical duration,length of stay and total hospitalization expenses.A safety evaluation was also ***:In total,246 eligible participants were enrolled,with 123 cases in each *** was no significant difference in the clinical effect between the two groups(100.00% vs.99.19%,P>0.05).Compared with the control group,the number of external haemorrhoids treated during the operation and the pain scores after operation were significantly reduced in the experimental group(P0.05).The surgical duration and length of stay in the expe

关键词： mixed haemorrhoids high suspension and low incision surgery randomized controlled trial Milligan-Morgan haemorrhoidectomy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Outcome of in vitro fertilization in endometriosis-associated infertility： a 5-year database cohort study

引用

Chinese Medical Journal 2012年第15期125卷 2688-2693页

作者： LIN Xiao-na wei Min-ling TONG Xiao-mei xu wei-hai ZHOU feng HUANG Qiong-xiao WEN Guo-feng ZHANG Song-ying Assisted Reproduction Unit Department of Obstetrics andGynecology Sir Run Run Shaw Hospital Zhejiang UniversitySchool of Medicine Hangzhou Zhejiang 310016 China

Background Endometriosis affects natural fertility through various approaches, and in vitro fertilization （IVF） is a good treatment. But the IVF result of endometriosis patients is still under debate. We investigated the effect of endometriosis on IVF by analyzing the data from a single reproductive center. Methods A retrospective, database-searched cohort study was performed. Relevant information was collected from the electronic records of women who underwent IVF/intracytoplasmic sperm injection between January 2006 and December 2010 in the Assisted Reproductive Unit of Sir Run Run Shaw Hospital. Patients with endometriosis were enrolled the study group. The rest of the women formed the control group. The main outcome was the clinical pregnancy rate. Secondary outcomes were oocytes retrieved number, fertilization rate, high-quality embryo rate, number of high-quality embryo for embryo transplantation, and implantation embryo/high-quality embryo ratio （IE/HQE ratio）. Comparisons were performed by the z2-test and independent t-test. Results The endometriosis group （n=177） had a markedly lower oocytes retrieved number, fertilization rate, implantation rate, and clinical pregnancy rate （7.6_＋5.1, 63.6%, 27.7%, and 45.2%, respectively） compared with the non-endometriosis group （n=4267; 11.8＋7.3, 68.4%, 36.2%, and 55.2%, respectively）. Stratified analysis showed that this difference was found in the subgroup younger than 35-years old, while only fertilization rate and implantation rate were different in the elder subgroup. The ratio of high-quality embryos transferred is lower in endometriosis group （53.7% vs. 71.8%, P 〈0.05）, but there is no difference in IE/HQE ratio between two groups. There is no significant difference in fertilization rate, implantation rate, and clinical pregnancy rate between mild and severe endometriosis patients. Conclusions Endometriosis patients suffer a decreasing IVF pregnancy rates mainly caused by reducing oocytes number and fertilization

关键词： fertilization in vitro, endometriosis pregnancy rate cohort study

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于不同跳跃检验下的高频波动率模型预测

引用

系统工程 2016年第12期34卷 10-16页

作者：徐伟举马锋魏宇西南交通大学经济管理学院四川成都610000

通过利用三种主流的跳跃检验识别方法,结合已实现异质自回归模型和基于已实现正负变差的思想,构建不同类型的高频波动率模型,以此评价不同跳跃检验的跳跃成分对波动率预测精度影响的优劣。MCS实证结果发现,跳跃作为解释变量有助于提高... 详细信息

通过利用三种主流的跳跃检验识别方法,结合已实现异质自回归模型和基于已实现正负变差的思想,构建不同类型的高频波动率模型,以此评价不同跳跃检验的跳跃成分对波动率预测精度影响的优劣。MCS实证结果发现,跳跃作为解释变量有助于提高波动率模型的预测能力。另外,本文还发现LM检验得到的跳跃成分更有助于提高波动率模型的预测精度。最后,基于已实现正负变差和LM跳跃检验构建的新的波动率模型,HAR-S-RV-JV,相比其他的高频波动率模型,具有更好的预测表现能力。

关键词：高频波动率模型跳跃预测 MCS检验

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The City Gas Emergency Dispatching Strategy Based on Multi-agent

The City Gas Emergency Dispatching Strategy Based on Multi-a...

引用

第26届中国控制与决策会议

作者： wei xu feng Liu Chao Wang Ya hui Beijing University of Civil Engineering and Architecture

With the widely use of the city gas, accidents have relatively increased. However, due to the particularity of emergency management, that is, it does not allow testing and the correctness of its management system and process is difficult to verify, the city gas emergency dispatching system has met unprecedented challenges. To this, we have established a city gas emergency dispatching simulation system based on Multi-agent. Applying the autonomy, initiative,reactivity and collaboration of Multi-agent to the city gas emergency dispatching system, we design the appropriate Agent and analyze the cooperation mechanism of Multi-agent function modules, thus to verify the rationality and effectiveness of rescue plan made by real emergency dispatching strategy.

关键词： City gas Emergency dispatching system Multi-agent Cooperation mechanisms

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

基于协同的装备制造业技术创新能力评价指标体系研究

引用

科学管理研究 2011年第5期29卷 26-30页

作者：徐丰伟大连交通大学管理学院辽宁大连116028

产业技术创新协同对于技术创新能力有着重要的影响。基于协同视角,提出产业技术创新能力主要由产业自身创新能力和产业创新内外部协同两大方面因素构成,由此构建了装备制造业技术创新能力框架。以此对装备制造业技术创新能力影响因素进... 详细信息

产业技术创新协同对于技术创新能力有着重要的影响。基于协同视角,提出产业技术创新能力主要由产业自身创新能力和产业创新内外部协同两大方面因素构成,由此构建了装备制造业技术创新能力框架。以此对装备制造业技术创新能力影响因素进行了分析,进而设计了装备制造业技术创新能力评价指标体系。

关键词：协同装备制造业技术创新能力评价指标体系

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

产业数字化与绿色技术创新的耦合协调

引用

技术经济与管理研究 2024年第3期 20-25页

作者：徐伟锋山东大学计算机科学与技术学院山东青岛310058 绍兴职业技术学院浙江绍兴312000

以长三角地区为核心研究对象,通过整理2013—2021年长三角地区各省份的面板数据,分析产业数字化与绿色技术创新发展的作用机制,构建产业数字化与绿色技术创新发展评价指标体系,并结合耦合协调度评价模型,实证检验长三角产业数字化与绿... 详细信息

以长三角地区为核心研究对象,通过整理2013—2021年长三角地区各省份的面板数据,分析产业数字化与绿色技术创新发展的作用机制,构建产业数字化与绿色技术创新发展评价指标体系,并结合耦合协调度评价模型,实证检验长三角产业数字化与绿色技术创新发展水平和耦合协调关系,以及两者耦合协调的地区差异和空间溢出效应。研究表明,在“双碳”目标下,产业数字化与绿色技术创新发展的耦合协调,将有效促进产业数字化转型升级,构建绿色低碳循环发展体系,推动产业的绿色低碳高速发展。同时,提出了对长三角地区产业数字化与绿色技术创新耦合协调发展的一些建议,以期助推区域经济绿色高质量发展。

关键词： “双碳”目标产业数字化绿色技术创新数字技术

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：